<?php

if(!defined('WY_ROOT')) exit;



class wechat_class extends Wy_Model{

	  function httpGet($url) {

		$curl = curl_init();

		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

		curl_setopt($curl, CURLOPT_TIMEOUT, 500);

		curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

		curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);

		curl_setopt($curl, CURLOPT_URL, $url);

		$res = curl_exec($curl);

		curl_close($curl);

		return $res;

	  }

     function getAccessToken() {

		

		// access_token 应该全局存储与更新，以下代码以写入到文件中做示例

		

		$data = json_decode(file_get_contents(WY_ROOT."/public/weixin/access_token.json"),true);
		

		$site=$this->fetch_one('weixin_config','id=1','*');
		

		//print_r($data->expire_time.time());

		if ($data['expire_time']< time()) {

		  // 如果是企业号用以下URL获取access_token

		  // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";

		  $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$site['wx_appid']."&secret=".$site['wx_appsecret'];

		

		  $res = json_decode($this->httpGet($url));
         
		  $access_token = $res->access_token;
          
		  //print_r($res);

		  if ($access_token) {

			$data['expire_time'] = time() + 7200;

			$data['access_token']= $access_token;

			$fp = fopen(WY_ROOT."/public/weixin/access_token.json", "w");

			fwrite($fp, json_encode($data));

			fclose($fp);

		  }

		} else {

		  $access_token = $data['access_token'];

		}

		return $access_token;

	  }

	 function getJsApiTicket() {

    // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例

    $data = json_decode(file_get_contents(WY_ROOT."/public/weixin/jsapi_ticket.json"));

    if (!$data||$data->expire_time < time()) {

      $accessToken = $this->getAccessToken();  

      // 如果是企业号用以下 URL 获取 ticket

      // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";

      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";

      $res = json_decode($this->httpGet($url));

      $ticket = $res->ticket;

      if ($ticket) {

        $data->expire_time = time() + 3000;

        $data->jsapi_ticket= $ticket;

        $fp = fopen(WY_ROOT."/public/weixin/jsapi_ticket.json", "w");

        fwrite($fp, json_encode($data));

        fclose($fp);

      }

    } else {

      $ticket = $data->jsapi_ticket;

    }

    return $ticket;

  }

   function createNonceStr($length = 16) {

    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

    $str = "";

    for ($i = 0; $i < $length; $i++) {

      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

    }

    return $str;

  }

  

   function getsignPackage($url){

	    $config=$this->fetch_one('weixin_config','id=1','*');

		$jsapiTicket = $this->getJsApiTicket();

		// 注意 URL 一定要动态获取，不能 hardcode.

		

		$timestamp = time();

		$nonceStr = $this->createNonceStr();

		// 这里参数的顺序要按照 key 值 ASCII 码升序排序

		$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

		$signature = sha1($string);

		$signPackage = array(

		  "appId"     => $config['wx_appid'],

		  "nonceStr"  => $nonceStr,

		  "timestamp" => $timestamp,

		  "url"       => $url,

		  "signature" => $signature,

		  "rawString" => $string

		);

		return $signPackage;

  }

   

}

?>